LA PAZ, Bolivia (AP) _ A former interior minister who played a key role in tracking down revolutionary leader Che Guevara died when a bomb he was carrying exploded, police said Wednesday.

Antonio Arguedas was killed Tuesday night in the wealthy La Paz neighborhood of Obrajes, just two blocks from the home of former President Gonzalo Sanchez de Lozada.

Police said they did not know why Arguedas was carrying a bomb or what he intended to do with it. Arguedas had been linked to an anti-communist nationalist group that recently exploded several bombs in downtown La Paz.

Arguedas was interior minister during the military regime of Rene Barrientos between 1964 and 1967 and played a key role in hunting down Guevara, who was killed by Bolivian rangers after being captured in a remote tropical area in southeastern Bolivia.

Guevara, who assisted in the triumph of the Cuban revolution, had gone to Bolivia in an effort to foment a rebellion there.